/**
 * Copyright (C) 2018 Fernando Cejas Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.fernandocejas.sample.core.di.viewmodel

import androidx.lifecycle.ViewModel
import androidx.lifecycle.ViewModelProvider
import javax.inject.Inject
import javax.inject.Provider
import javax.inject.Singleton

@Singleton
@Suppress("UNCHECKED_CAST")
class ViewModelFactory
@Inject constructor(private val creators: Map<Class<out ViewModel>,
        @JvmSuppressWildcards Provider<ViewModel>>) : ViewModelProvider.Factory {

    override fun <T : ViewModel> create(modelClass: Class<T>): T {
        val creator = creators[modelClass] ?:
            creators.asIterable().firstOrNull { modelClass.isAssignableFrom(it.key) }?.value ?:
            throw IllegalArgumentException("Unknown ViewModel class $modelClass")

        return try { creator.get() as T }
        catch (e: Exception) { throw RuntimeException(e) }
    }
}